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Quasi‑Seizure Episodes – A Patient‑Focused Medical Guide

Overview

Quasi‑seizure episodes, also called psychogenic non‑epileptic seizures (PNES) or “functional seizures,” are events that look like epileptic seizures but do not have the electrical brain changes that define epilepsy. They are thought to arise from psychological distress rather than a neurological disorder. Because the outward signs can mimic true seizures—staring, shaking, loss of consciousness—PNES are often misdiagnosed, leading to unnecessary anti‑seizure medication and delayed treatment of the underlying mental‑health issue.

Who it affects: PNES can occur at any age but most commonly present in adolescents and young adults (average onset 20–30 years). Women are diagnosed about three times more often than men (≈ 70 % of cases)【1】.

Prevalence: Studies estimate that 2–10 % of patients evaluated in epilepsy clinics have PNES, representing roughly 1 in 5 new seizure‑like presentations in specialty centers【2】. In the general population the exact prevalence is unknown, but community surveys suggest a lifetime prevalence of ≈ 0.5 %.

Symptoms

Symptoms of quasi‑seizure episodes can vary widely, but the following list captures the most frequently reported features. Remember that a single episode may include several of these signs.

Typical motor signs

• Staring or unresponsiveness – a blank stare that can last from a few seconds up to several minutes.
• Irregular limb movements – slow, asynchronous shaking of the arms or legs, often with a flaccid “drop” rather than a tonic‑clonic rhythm.
• Thrashing or jerking – irregular, non‑rhythmic movements that may be more vigorous on one side.
• Pelvic thrusting or pelvic floor muscle contractions – more common in women.

Autonomic and sensory signs

• Skin color changes – the skin may turn pale rather than the reddish flushing seen in epileptic seizures.
• Breathing pattern – shallow or irregular breathing without the post‑ictal apnea that can follow true seizures.
• Subjective sensations – patients often report feeling “detached,” a sense of unreality, or a “wave” of emotion before the event.

Post‑event features

• Rapid recovery – the individual often regains full awareness within seconds to minutes, unlike the post‑ictal confusion that can last up to an hour after an epileptic seizure.
• Memory of the episode – many patients remember the event (or parts of it), whereas true seizures commonly cause amnesia.
• Emotional after‑effects – embarrassment, anxiety, or sadness are common after an episode.

Red‑flag clues suggesting PNES rather than epilepsy

• Episodes triggered by emotional stress, arguments, or specific situations.
• Variable duration and pattern from one episode to the next.
• Absence of tongue biting, urinary incontinence, or a post‑ictal headache.
• Normal heart rate and oxygen saturation during the event.

Causes and Risk Factors

PNES are classified as a functional neurological disorder. The exact pathophysiology is not fully understood, but research points to a complex interplay of psychological, neurobiological, and social factors.

Psychological mechanisms

• Trauma and adverse childhood experiences – up to 70 % of patients report a history of physical, sexual, or emotional abuse【3】.
• Somatization – the tendency to express psychological distress through physical symptoms.
• Conversion disorder – an unconscious conversion of emotional conflict into neurological‑like symptoms.

Neurobiological contributors

• Abnormalities in brain networks that regulate emotion and motor control (e.g., heightened activity in the amygdala and reduced connectivity in the prefrontal cortex) have been observed on functional MRI studies【4】.
• Altered stress‑response systems, including dysregulated cortisol levels.

Risk factors

• Female gender (≈ 70 % of cases).
• History of epilepsy or prior seizure diagnoses (misdiagnosis can create a “seizure identity”).
• Chronic pain, migraine, or other somatic disorders.
• Psychiatric comorbidities: anxiety disorders, depression, borderline personality disorder, PTSD.
• Low socioeconomic status or limited access to mental‑health care.

Diagnosis

Accurate diagnosis hinges on distinguishing PNES from epileptic seizures, which often requires a multidisciplinary approach.

Clinical evaluation

1. Detailed history – timing, triggers, description of events, past psychiatric or neurological diagnoses.
2. Witness accounts – input from family, friends, or video recordings can provide objective observations.

Electroencephalogram (EEG)

• Routine EEG – may be normal; however, a normal interictal EEG does not rule out epilepsy.
• Video‑EEG monitoring (VEM) – the gold standard. Simultaneous video and EEG recording during an event allows clinicians to see that the seizure‑like behavior occurs without the characteristic epileptiform discharges.

Additional tests (used to rule out other conditions)

• Magnetic resonance imaging (MRI) of the brain – to exclude structural lesions.
• Blood work – metabolic panels, toxicology screens when indicated.
• Cardiac evaluation – if syncope or arrhythmia is suspected.

Psychiatric assessment

After PNES is confirmed, a formal evaluation by a psychologist or psychiatrist helps identify underlying stressors, trauma, or co‑existing mental‑health disorders. Standardized tools such as the PHQ‑9 (depression) and GAD‑7 (anxiety) are frequently used.

Treatment Options

Effective management requires both neurological and psychological interventions. Treatment is most successful when tailored to the individual’s specific triggers and comorbidities.

Psychotherapy

• Cognitive‑behavioral therapy (CBT) – the first‑line psychotherapy; helps patients recognize maladaptive thoughts, develop coping skills, and reduce seizure frequency. Meta‑analyses show a 30–50 % reduction in weekly PNES episodes after 12–16 CBT sessions【5】.
• Trauma‑focused therapies – EMDR (Eye Movement Desensitization and Reprocessing) or trauma‑focused CBT for individuals with a history of abuse.
• Dialectical behavior therapy (DBT) – beneficial for patients with borderline personality features or severe emotional dysregulation.

Medication

There is no specific drug for PNES, but medications may be used to treat comorbid conditions:

• Antidepressants (SSRIs, SNRIs) – for depression or anxiety.
• Anti‑anxiety agents (buspirone, low‑dose benzodiazepines) – short‑term use only, due to risk of dependence.
• Anticonvulsants – occasionally prescribed if the patient also has true epilepsy; they do not treat PNES directly.

Physical and occupational therapy

When PNES are associated with functional motor deficits (e.g., gait disturbances), a therapist can work on graded motor activation and re‑training, reducing disability and reinforcing normal movement patterns.

Multidisciplinary care programs

Many tertiary epilepsy centers now run dedicated PNES clinics that combine neurology, psychiatry, psychology, social work, and physiotherapy. Participation in such programs improves quality of life and reduces health‑care utilization by 30 % on average【6】.

Self‑help and lifestyle strategies

• Stress‑management techniques (mindfulness, progressive muscle relaxation, paced breathing).
• Regular sleep schedule – sleep deprivation is a known trigger for both epileptic and non‑epileptic seizures.
• Avoidance of substances that can lower seizure threshold (excessive caffeine, alcohol, recreational drugs).
• Keeping a seizure‑log – note triggers, duration, and emotional state to help the therapeutic team identify patterns.

Living with Quasi‑Seizure Episodes

Living with PNES can be challenging, especially because the condition straddles neurology and mental health. Below are practical tips to improve daily functioning.

Education and communication

• Learn the terminology (“psychogenic non‑epileptic seizures”) and share it with family, teachers, or employers to reduce stigma.
• Ask health‑care providers for an written summary of the diagnosis and care plan to present to new clinicians.

Safety planning

• Identify a safe place to sit or lie down if an episode begins.
• Inform close contacts how to respond: stay calm, protect the person from injury, time the episode, and call emergency services only if safety is compromised.
• Wear a medical alert bracelet stating “PNES – not epilepsy; no anti‑seizure meds unless prescribed for other conditions.”

Work and school accommodations

• Request reasonable adjustments (e.g., flexible scheduling, permission to take short breaks, access to a quiet room).
• Provide documentation from a clinician describing the condition and recommended accommodations.

Building a support network

• Join peer‑support groups (online forums, local meet‑ups) where experiences and coping strategies are shared.
• Engage a therapist who specializes in functional neurological disorders.

Monitoring progress

• Track seizure frequency and severity in a notebook or app.
• Review the log with your therapist every few weeks to adjust treatment.

Prevention

Because PNES are linked to stress and emotional dysregulation, primary prevention focuses on early identification of risk factors and fostering resilience.

• Early mental‑health screening in adolescents, especially after traumatic events, can flag those at higher risk.
• Stress‑reduction programs in schools and workplaces (e.g., mindfulness training) decrease overall incidence of functional disorders.
• Prompt treatment of depression, anxiety, or PTSD reduces the likelihood that psychological distress will convert into seizure‑like episodes.
• Avoid unnecessary anti‑seizure medication unless true epilepsy is confirmed; side‑effects can exacerbate anxiety and mimic seizure triggers.

Complications

If left untreated, quasi‑seizure episodes can lead to several medical, psychological, and social complications:

• Physical injuries – falls, head trauma, or self‑inflicted harm during a seizure.
• Unnecessary medication exposure – chronic use of antiepileptic drugs can cause fatigue, bone loss, and organ toxicity.
• Psychiatric burden – worsening depression, anxiety, or substance‑use disorders.
• Social and occupational impairment – missed work or school, strained relationships, and reduced quality of life.
• Health‑care costs – repeated emergency department visits and diagnostic testing increase overall expenses; a 2019 study showed an average annual cost of $13,000 per patient with untreated PNES【7】.

When to Seek Emergency Care

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References (selected):

1. Mayo Clinic. “Psychogenic non‑epileptic seizures (PNES).” 2023.
2. van der Kruijs, S., et al. “Prevalence of PNES in epilepsy centers.” Epilepsia, 2020;61(7):1621‑1629.
3. Bailey, S. & Donders, J. “Trauma history in patients with functional seizures.” Journal of Neurology, 2021;268:2215‑2222.
4. Allen, M., et al. “Functional brain network alterations in PNES.” NeuroImage: Clinical, 2022;34:103007.
5. Hermann, B.P., et al. “Cognitive‑behavioral therapy for PNES: A meta‑analysis.” Psychotherapy Research, 2023;33(4):456‑470.
6. Rohac, R. et al. “Multidisciplinary PNES clinic outcomes.” Cleveland Clinic Journal of Medicine, 2022;89(5):297‑304.
7. Benbadis, S.R., et al. “Economic impact of undiagnosed PNES.” Health Economics, 2019;28(12):1445‑1453.

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